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Analysis of long-term data on the state of populations of entomofauna in agricultural landscapes is of practical importance for determining the feasibility of chemical protection of agroecosystems. Through the example of species of a harmful entomological complex of winter wheat in different natural and climatic zones of Ukraine, the dynamics of the population size of insects under global warming and the indicator of the living planet index (LPI) have been studied.Indicators of long-term insect's population size were used as input data based on the results of state phytosanitary monitoring. According to the analysed data on the state of indicator populations during 2009-2017, the indicators of the population size and weighted LPI were constantly decreasing. The correlation between the size of an insect's population and the course of natural warming does not make it possible to unambiguously explain the state of populations by the effect of an increased amount of heat.

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The structure of cephalic ganglia was studied in all the larval instars and the pupae of the large fruittree tortrix Archips podana Scopoli. The main centers of the supraesophageal ganglion develop non-uniformly. At the larval stage, the mushroom bodies and structures of the central complex develop earlier than the optic ganglia and olfactory lobes. Continuity in the visual system development is expressed in integration of residues of the larval stemmata into the imaginal optic lobes at the pupal stage.